<template>
  <div class="list" ref="wrapper">
    <div>
      <div class="area">
        <div class="title border-topbottom">当前城市</div>
        <div class="button-list">
          <div class="button-wrapper">
            <div class="button">{{this.$store.state.city}}</div>
          </div>
        </div>
      </div>
      <div class="area">
        <div class="title border-topbottom">热门城市</div>
        <div class="button-list">
          <div class="button-wrapper" 
                v-for="item in hotCities" 
                :key="item.id"
                @click="handleCityClick(item.name)">
            <div class="button">{{item.name}}</div>
          </div>
        </div>
      </div>
      <div class="area" v-for="(item, index) in cities" :key="index" :ref="index">
        <div class="title border-topbottom">{{index}}</div>
        <div class="item-list" v-for="innerItem in item" :key="innerItem.id">
          <div class="item border-bottom" 
                @click="handleCityClick(innerItem.name)">
                {{innerItem.name}}
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script>
import Bscroll from 'better-scroll'
  export default {
    name: 'cityList',
    props: {
      hotCities: Array,
      cities: Object,
      letter: String
    },
    methods: {
      handleCityClick (city) {
        this.$store.commit('changeCity', city)
        this.$router.push('/')
      }
    },
    mounted () {
      this.scroll = new Bscroll(this.$refs.wrapper)
    },
    watch: {
      letter () {
        if (this.letter) {
          const element = this.$refs[this.letter][0]
          this.scroll.scrollToElement(element)
        }
      }
    }
  }
</script>

<style lang="stylus" scoped>
  .border-topbottom
    &:before
      border-color: #cccccc
    &:after
      border-color: #cccccc
  .border-bottom
    &:before
      border-color: #cccccc
  .list
    overflow: hidden
    position: absolute
    top: 1.58rem
    left: 0
    right: 0
    bottom: 0
    .title
      line-height: .54rem
      background: #eeeeee
      padding-left: .2rem
      color: #666
      font-size: .26rem
    .button-list
      overflow: hidden
      padding: .1rem .6rem .1rem .1rem
      .button-wrapper
        float: left 
        width: 33.33%
        .button
          margin: .1rem
          padding: .1rem 0
          text-align: center
          border: .02rem solid #cccccc
          border-radius: .06rem
    .item-list
      .item
        line-height: .76rem
        padding-left: .2rem
</style>
